A tightwad toff, but he does wish to help (5,4)
I believe the answer is:
means well
'a tightwad' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'toff but he does wish to help' is the wordplay.
I cannot quite see how this works, but
'toff' could be 'swell' (wealthy or high-class person) and 'swell' is located in the answer.
'wish' could be 'mean' (meaning is a kind of wishing) and 'mean' is found in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for means well that I've seen before include "tries to be generous" , "full of good intentions" .)